Re: [Lse-tech] Re: ext3 performance bottleneck as the number of spindles gets large

[kwijibo@zianet.com]

If you tried the link earlier and it didn't work I'm sorry.
Had a mental brain fart with the web server.  It should
work now.

Steven

kwijibo@zianet.com wrote:

> This web site may be of interest for this discussion:
> http://labs.zianet.com.  I have benchmarks using NFS
> with ext3 there.  It also compares ext3 with ReiserFS.
> The page is not quite complete but it has the
> benchmarks up.
>
> Steven
>
> Duc Vianney wrote:
>
>> Andrew Morton wrote:
>>  
>>
>>> If you have time, please test ext2 and/or reiserfs and/or ext3
>>> in writeback mode.
>>>   
>>
>> I ran IOzone on ext2fs, ext3fs, JFS, and Reiserfs on an SMP 4-way
>> 500MHz, 2.5GB RAM, two 9.1GB SCSI drives. The test partition is 1GB,
>> test file size is 128MB, test block size is 4KB, and IO threads varies
>> from 1 to 6. When comparing with other file system for this test
>> environment, the results on a 2.5.19 SMP kernel show ext3fs is having
>> performance problem with Writes and in particularly, with Random Write.
>> I think the BKL contention patch would help ext3fs, but I need to verify
>> it first.
>>
>> The following data are throughput in MB/sec obtained from IOzone
>> benchmark running on all file systems installed with default options.
>>
>>
>> Kernels           2519smp4   2519smp4   2519smp4   2519smp4
>> No of threads=1   ext2-1t    jfs-1t     ext3-1t    reiserfs-1t
>>
>> Initial write     138010     111023      29808      48170
>> Rewrite           205736     204538     119543     142765
>> Read              236500     237235     231860     236959
>> Re-read           242927     243577     240284     242776
>> Random read       204292     206010     201664     207219
>> Random write      180144     180461       1090     121676
>>
>> No of threads=2  ext2-2t     jfs-2t     ext3-2t    reiserfs-2t
>>
>> Initial write     196477     143395      62248      55260
>> Rewrite           261641     261441     126604     205076
>> Read              292566     292796     313562     291434
>> Re-read           302239     306423     341416     303424
>> Random read       296152     295430     316966     288584
>> Random write      253026     251013        958     203358
>>
>> No of threads=4  ext2-4t     jfs-4t    ext3-4t     reiserfs-4t
>>
>> Initial write      79513     172302      42051      48782
>> Rewrite           256568     269840     124912     231395
>> Read              290599     303669     327066     283793
>> Re-read           289578     303644     327362     287531
>> Random read       354011     353455     353806     351671
>> Random write      279704     279922       2482     250498
>>
>> No of threads=6  ext2-6t     jfs-6t    ext3-6t     reiserfs-6t
>>
>> Initial write      98559      69825      59728      15576
>> Rewrite           274993     286987     126048     232193
>> Read              330522     326143     332147     326163
>> Re-read           339672     328890     333094     326725
>> Random read       348059     346154     347901     344927
>> Random write      281613     280213       3659     227579
>>
>> Cheers,
>> Duc J Vianney, dvianney@us.ibm.com
>> home page: http://www-124.ibm.com/developerworks/opensource/linuxperf/
>> project page: http://www-124.ibm.com/developerworks/projects/linuxperf
>>
>>
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>>  
>>
>
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